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2. Wireless security camera - Wikipedia

   en.wikipedia.org/wiki/Wireless_security_camera

   Wireless security cameras function best when there is a clear line of sight between the camera(s) and the receiver. If digital wireless cameras are outdoors and have a clear line of sight, they typically have a range between 250 and 450 feet. If located indoors, the range can be limited to 100 to 150 feet.

3. Closed-circuit television - Wikipedia

   en.wikipedia.org/wiki/Closed-circuit_television

   Previous generations of wireless security cameras relied on analogue technology; modern wireless cameras use digital technology with usually more secure and interference-free signals. [167] Wireless mesh networks have been used for connection with the other radios in the same group. [ 168 ]

4. Closed-circuit television camera - Wikipedia

   en.wikipedia.org/wiki/Closed-circuit_television...

   These cameras do not require a video capture card because they work using a digital signal which can be saved directly to a computer. The signal is compressed 5:1, but DVD quality can be achieved with more compression (MPEG-2 is standard for DVD-video, and has a higher compression ratio than 5:1, with a slightly lower video quality than 5:1 at best, and is adjustable for the amount of space to ...

5. Some doorbell cameras sold on Amazon and other online sites ...

   www.aol.com/news/doorbell-cameras-sold-amazon...

   Some doorbell cameras sold by Amazon and other online retailers have security flaws that could allow bad actors to view footage from the devices or control them completely, according to an ...

6. Consumer IR - Wikipedia

   en.wikipedia.org/wiki/Consumer_IR

   Consumer IR, consumer infrared, or CIR is a class of devices employing the infrared portion of the electromagnetic spectrum for wireless communications. [ citation needed ] CIR ports are commonly found in consumer electronics devices such as television remote controls , PDAs , laptops , computers , and video game controllers.

7. Infrared - Wikipedia

   en.wikipedia.org/wiki/Infrared

   Digital cameras often use infrared blockers. Cheaper digital cameras and camera phones have less effective filters and can view intense near-infrared, appearing as a bright purple-white color. This is especially pronounced when taking pictures of subjects near IR-bright areas (such as near a lamp), where the resulting infrared interference can ...